/* $Id: cpu.c,v 1.2 2003/10/19 16:54:39 carlos Exp $ *//* Copyright (C) 1998-99 Martin Baulig   This file is part of LibGTop 1.0.   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.   LibGTop is free software; you can redistribute it and/or modify it   under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 2 of the License,   or (at your option) any later version.   LibGTop is distributed in the hope that it will be useful, but WITHOUT   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   for more details.   You should have received a copy of the GNU General Public License   along with LibGTop; see the file COPYING. If not, write to the   Free Software Foundation, Inc., 59 Temple Place - Suite 330,   Boston, MA 02111-1307, USA.*/#include <stdlib.h>#include <sys/systemcfg.h>#include <sys/sysinfo.h>#include <glibtop.h>#include <glibtop/error.h>#include <glibtop/cpu.h>#include <utils.h>static const unsigned long _glibtop_sysdeps_cpu = (1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +(1L << GLIBTOP_CPU_SYS) + (1L << GLIBTOP_CPU_IDLE) +(1L << GLIBTOP_CPU_NICE) + (1 << GLIBTOP_CPU_FREQUENCY) +(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +(1L << GLIBTOP_XCPU_SYS) + (1L << GLIBTOP_XCPU_IDLE) +(1L << GLIBTOP_XCPU_NICE);/* Init function. */voidglibtop_init_cpu_p (glibtop *server){	off_t result;	server->ncpu = _system_configuration.ncpus;	if (server->ncpu == 1)	{		server->ncpu = 0; /* means single-processor, see glibtop.h */	}	result = _glibtop_get_kmem_offset(server, "cpuinfo");	if (result == -1)	{		server->sysdeps.cpu = 0;		return;	}	server->machine.cpuinfo_offset = result;	server->machine.cpuinfo = (struct cpuinfo*)calloc(_system_configuration.ncpus, sizeof(struct cpuinfo));	server->sysdeps.cpu = _glibtop_sysdeps_cpu;}/* Provides information about cpu usage. */voidglibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf){	int result;	int cpu;	glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_CPU), 0);	memset (buf, 0, sizeof (glibtop_cpu));	result = _glibtop_get_kmem_info(server, server->machine.cpuinfo_offset,					server->machine.cpuinfo,					_system_configuration.ncpus 						* sizeof(struct cpuinfo));	if (result <= 0)	{		glibtop_error_io_r (server, "Cannot read cpuinfo");		return;	}		buf->idle = 0;	buf->user = 0;	buf->sys = 0;	buf->nice = 0;	for (cpu = 0; cpu < _system_configuration.ncpus; cpu++)	{		if (cpu < GLIBTOP_NCPU)		{			buf->xcpu_idle[cpu] = 				server->machine.cpuinfo[cpu].cpu[CPU_IDLE];			buf->xcpu_user[cpu] =				server->machine.cpuinfo[cpu].cpu[CPU_USER];			buf->xcpu_sys[cpu] =				server->machine.cpuinfo[cpu].cpu[CPU_KERNEL];			buf->xcpu_nice[cpu] =				server->machine.cpuinfo[cpu].cpu[CPU_WAIT];			buf->xcpu_total[cpu] = buf->xcpu_idle[cpu] +					       buf->xcpu_user[cpu] +					       buf->xcpu_sys[cpu] +					       buf->xcpu_nice[cpu];		}		buf->idle += server->machine.cpuinfo[cpu].cpu[CPU_IDLE];		buf->user += server->machine.cpuinfo[cpu].cpu[CPU_USER];		buf->sys  += server->machine.cpuinfo[cpu].cpu[CPU_KERNEL];		buf->nice += server->machine.cpuinfo[cpu].cpu[CPU_WAIT];		buf->total = buf->idle + buf->user + buf->sys + buf->nice ;	}		buf->frequency = sysconf(_SC_CLK_TCK);	buf->flags = _glibtop_sysdeps_cpu;}